Resting Membrane Potential

Why does the resting membrane potential not settle at the potassium equilibrium potential?

• Because of the sodium-potassium pump activity

• Due to the equilibrium potential of chloride

• Due to the impermeability of the neuron membrane to sodium

• Because sodium ions also affect the membrane potential

What initially creates a small membrane potential in a neuron?

• The action of the sodium-potassium pump

• The influx of potassium ions

• The movement of sodium ions outside the neuron

• The addition of organic anions to the cytoplasm

What is the role of the sodium-potassium pump in neuron function?

• It decreases the membrane potential

• It makes the neuron membrane impermeable to ions

• It balances the concentration of sodium and potassium inside and outside the neuron

• It uses ATP to transport sodium and potassium ions across the neuron membrane

Why do the concentrations of potassium and sodium change inside the neuron but not outside?

• Because of the action of leak channels

• Due to the impermeability of the neuron membrane to these ions

• Because the extracellular fluid volume is too large

• Due to the equilibrium potential being reached

Which of the following are true when a neuron is at resting membrane potential? Mark all that apply.

• the inside of the neuron is negatively charged compared to the outside.

• the inside of the neuron is positively charged compared to the outside.

• The inside of the neuron is approximately +30 mV.

• The inside of the neuron is approximately -55 mV.

• The inside of the neuron is approximately -70 mV.

Which of the following best describes a neuron at resting membrane potential?

• depolarized

• repolarized

• polarized

• hyperpolarized

• none of the above

Tags

NGSS.HS-PS1-5

In the resting phase of the axon during an impulse conduction, the outside of the axon has a positive charge while the inside of the axon has a negative charge. this resting state is also called -

• polarized

• insulated

• depolarized

• conductive

When a neuron is at REST,

• the inside of the neuron is negatively charged compared to the outside.

• the inside of the neuron is positively charged compared to the outside.

• there is no charge difference established

• none of these is true

What number(s) on the graph represents the Resting Potential?

• 1 and 2

• 1 and 5

• 2 and 3

• 3 and 4

Which of the following are true when a neuron is at resting membrane potential?

• the inside of the neuron is negatively charged compared to the outside.

• the inside of the neuron is positively charged compared to the outside.

• The inside of the neuron is approximately +30 mV.

• The inside of the neuron is approximately -55 mV.

• The inside of the neuron is approximately -70 mV.

Tags

NGSS.HS-LS1-3